improved

git-svn-id: http://moon:8086/svn/projects/Stock@302 fda53097-d464-4ada-af97-ba876c37ca34

mpl_test.py

@@ -0,0 +1,25 @@
+from matplotlib import pyplot as plt
+
+class LineBuilder:
+    def __init__(self, line):
+        self.line = line
+        self.xs = list(line.get_xdata())
+        self.ys = list(line.get_ydata())
+        self.cid = line.figure.canvas.mpl_connect('button_press_event', self)
+
+    def __call__(self, event):
+        print('click', event)
+        if event.inaxes!=self.line.axes: return
+        self.xs.append(event.xdata)
+        self.ys.append(event.ydata)
+        self.line.set_data(self.xs, self.ys)
+        self.line.figure.canvas.draw()
+
+fig = plt.figure()
+ax = fig.add_subplot(111)
+ax.set_title('click to build line segments')
+line, = ax.plot([0], [0])  # empty line
+linebuilder = LineBuilder(line)
+
+plt.show()
+